CN112117431A - Deviation rectifying method and deviation rectifying system - Google Patents
Deviation rectifying method and deviation rectifying system Download PDFInfo
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- CN112117431A CN112117431A CN201910540991.5A CN201910540991A CN112117431A CN 112117431 A CN112117431 A CN 112117431A CN 201910540991 A CN201910540991 A CN 201910540991A CN 112117431 A CN112117431 A CN 112117431A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The application provides a deviation rectifying method for a rubberizing closed-loop deviation rectifying system, which comprises the following steps: obtaining rubberizing distance data; calculating a variation coefficient according to the rubberizing distance data; judging whether the variation coefficient meets the preset requirement or not; and when the variation coefficient meets the preset requirement, correcting the deviation of the rubberizing closed-loop deviation correcting system. Whether the variation coefficient meets the requirement or not is judged before deviation correction, so that whether the equipment is in a stable state or not is judged, then deviation correction is carried out, larger batch defects caused by deviation correction in instable equipment are avoided, and the stability of the deviation correction effect of the equipment is improved.
Description
Technical Field
The application relates to the field of battery manufacturing, in particular to a deviation rectifying method and a deviation rectifying system for battery materials.
Background
In the production process of battery materials, pole pieces need to be rubberized, perfect closed-loop deviation correction cannot be achieved through pole piece rubberizing effect detection in the current industry, and particularly whether equipment is stable or not cannot be monitored before deviation correction. Once the equipment is in an unstable state and directly enters a deviation rectifying program, a larger degree of deviation can be caused, and even the whole roll of pole pieces are scrapped, so that the batch is poor.
Disclosure of Invention
The application provides a deviation rectifying method and a deviation rectifying system with more stable deviation rectifying effect.
The application provides a deviation rectifying method for a rubberizing closed-loop deviation rectifying system, wherein the deviation rectifying method comprises the following steps:
obtaining rubberizing distance data; calculating a variation coefficient according to the rubberizing distance data; judging whether the variation coefficient meets the preset requirement or not; and when the variation coefficient meets the preset requirement, correcting the deviation of the rubberizing closed-loop deviation correcting system.
Further, the calculating a coefficient of variation according to the rubberizing distance data includes: and calculating an average value and a standard deviation according to the rubberizing distance data, wherein the variation coefficient is a quotient of the standard deviation and the average value.
Further, the deviation rectifying method comprises the following steps: the average value of the rubberizing distance data is differentiated from an ideal standard value to obtain a first difference value, and when the first difference value is larger than a first preset value, a coefficient larger than 1 is multiplied by the variation coefficient to obtain a new variation coefficient; and judging whether the new variation coefficient meets the preset requirement, and rectifying the deviation of the rubberizing closed-loop deviation rectifying system when the new variation coefficient meets the preset requirement.
Further, when the first difference is greater than the first preset value, multiplying the coefficient of variation by a coefficient greater than 1 to obtain a new coefficient of variation includes: and selecting different coefficients to be multiplied by the variation coefficients according to the first difference, wherein the coefficients are all larger than 1.
Further, the rubberizing distance data comprises one or more of distance data of the head of the gummed paper exposing the pole piece, distance data of the tail of the gummed paper exposing the pole piece, distance data of a gummed paper covering coating, distance data of the gummed paper and a coating edge, distance data of the gummed paper covering a pole lug, distance data of the gummed paper covering a sealant and distance data of the width of the gummed paper.
Further, when the rubberizing distance data is distance data of the pole piece exposed at the head and the tail of the adhesive tape, the distance data of the pole piece exposed at the head of the adhesive tape and the distance data of the pole piece exposed at the tail of the adhesive tape are differed to obtain a second difference value, and when the second difference value is larger than a second preset value, a coefficient larger than 1 is multiplied by the variation coefficient to obtain a new variation coefficient; and judging whether the new variation coefficient meets the preset requirement, and rectifying the deviation of the rubberizing closed-loop deviation rectifying system when the new variation coefficient meets the preset requirement.
Further, the acquiring the rubberizing distance data includes: obtaining a plurality of rubberizing distance data, removing extreme values, and primarily filtering the rubberizing distance data; or setting a threshold range to carry out preliminary filtering on the rubberizing distance data.
Further, when the first difference is smaller than the lower correction limit value, correction is not performed.
Further, when the first difference is larger than the deviation correction upper limit value, the deviation correction upper limit value is sent to the controller.
The application also provides a deviation correcting system for detect and rectify a deviation to the material rubberizing effect, include: an image acquisition device that acquires rubberizing distance data; the processor calculates a variation coefficient according to the rubberizing distance data and judges whether the variation coefficient meets a preset requirement or not; and the controller is used for controlling the rubberizing closed-loop deviation rectifying system to rectify the deviation when the variation coefficient meets the preset requirement.
In this application, through calculating the coefficient of variation after obtaining rubberizing distance data, whether accord with according to the coefficient of variation and predetermine the requirement and judge that equipment is in stable state, if stable, then rectify, if unstable, then do not rectify and send the suggestion, avoided rectifying when equipment is unstable and rectifying in a trade and cause bigger degree batch bad, the effect of rectifying of equipment is more stable.
Drawings
FIG. 1 is a schematic illustration of pole piece rubberizing according to the present application;
FIG. 2 is a schematic diagram of a deviation rectifying method according to the present application;
FIG. 3 is a schematic view of a deviation correcting system of the present application;
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. Where the following description refers to the accompanying drawings, corresponding numbers in different drawings indicate corresponding or analogous elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
The application provides a deviation rectifying method for a rubberizing closed-loop deviation rectifying system, wherein the deviation rectifying method comprises the following steps:
obtaining rubberizing distance data; calculating a variation coefficient according to the rubberizing distance data; judging whether the variation coefficient meets the preset requirement or not; and when the variation coefficient meets the preset requirement, correcting the deviation of the rubberizing closed-loop deviation correcting system.
As shown in fig. 1, in the production process of the pole piece, the pole piece 1 needs to be removed and the protective adhesive is pasted, and the pole tab 2 is welded on the pole piece 1, so that the adhesive paper is divided into a pole tab adhesive 3 and a pole piece adhesive 4. The rubberizing distance data comprises distance data d1 of the head of the gummed paper exposed out of the pole piece, distance data d2 of the tail of the gummed paper exposed out of the pole piece, distance data d3 of a gummed paper covering coating, distance data L1 of the gummed paper and a coating edge, distance data d4 of the gummed paper covering a tab, distance data d5 of the gummed paper covering the sealant 5, distance data d6 of the width of the gummed paper and the like. The deviation rectifying method provided by the present application is described in detail below by taking the distance data d1 of the tab exposed at the head of the adhesive tape and the distance data d2 of the tab exposed at the tail of the adhesive tape as examples, and other distance data are not given as examples.
As shown in fig. 2, the deviation rectifying method of the embodiment includes:
step S1: and obtaining rubberizing distance data.
Taking the distance data d1 of the tab exposed at the head of the adhesive tape and the distance data d2 of the tab exposed at the tail of the adhesive tape as an example, the distance data d1 of a plurality of tab exposed at the head of the adhesive tape and the distance data d2 of a plurality of tab exposed at the tail of the adhesive tape are obtained, and the average value m1 and the standard deviation s1 of the distance data of the tab exposed at the head of the adhesive tape and the average value m2 and the standard deviation s2 of the distance data of the tab exposed at the tail of the adhesive tape are obtained by respectively calculating the average value and the standard deviation.
In some embodiments, the obtained several rubberized distance data may be preliminarily filtered. The first method is as follows: and removing extreme values after obtaining a plurality of rubberizing distance data, and performing preliminary filtering on the rubberizing distance data. For example, after the distance data d1 that the pole piece is exposed at 100 gummed paper heads is acquired, the 100 distance data d1 are sorted, and a plurality of extreme values are removed, for example, 5 maximum values and 5 minimum values are removed, but a ratio may also be set, for example, 5% of the total number is used to remove the maximum values and the minimum values. The second method comprises the following steps: and setting a threshold range to preliminarily filter the rubberizing distance data after acquiring a plurality of rubberizing distance data. Taking the data d1 of the distance of the head of the adhesive tape from the pole piece as an example, normally, if the value of d1 should be 0.6mm, the threshold range can be set to be [0.5, 0.7], and if the value of d1 is outside [0.5, 0.7], the data is considered to be obviously abnormal data and is filtered.
Step S2: and calculating the variation coefficient according to the rubberizing distance data.
After a plurality of rubberizing distance data are obtained and the average value and the standard deviation are calculated, the standard deviation and the average value are subjected to quotient to obtain the variation coefficient.
Taking the distance data d1 of the pole piece exposed at the head of the adhesive tape and the distance data d2 of the pole piece exposed at the tail of the adhesive tape as an example, the standard deviation s1 of the distance data of the pole piece exposed at the head of the adhesive tape is quotient with the average value m1 to obtain the coefficient of variation e1 of the head of the adhesive tape, and the standard deviation s2 of the distance data of the pole piece exposed at the tail of the adhesive tape is quotient with the average value m2 to obtain the coefficient of variation e2 of the tail of the adhesive tape.
Step S3: and judging whether the variation coefficient meets the preset requirement.
Generally, under different usage environments and according to different customer requirements, a programmer may preset a variation coefficient range, where the variation coefficient within the range is considered acceptable, in other words, when the variation coefficient is within the range, the device may be considered stable, and the variation coefficient range is the preset requirement. In some embodiments, the predetermined requirement for the coefficient of variation may be equal to or less than 8%.
Step S4: and when the variation coefficient meets the preset requirement, correcting the deviation of the rubberizing closed-loop deviation correcting system.
For example, whether the variation coefficient e1 of the head of the adhesive tape is less than or equal to 8% and the variation coefficient e2 of the tail of the adhesive tape is less than or equal to 8% is judged, and if the variation coefficients are met, the control system enters a deviation rectifying mode; if not, the operator is prompted that the current equipment is in an unstable state, and the running state of the equipment needs to be checked manually. By judging the variation coefficient before the equipment is corrected, a threshold is equivalently set for correction, and the condition that the equipment starts to correct the deviation blindly to cause larger errors is avoided.
After the equipment enters the deviation rectifying mode, a plurality of specific deviation rectifying modes can be adopted, for example, the average value of the distance data d1 of the plurality of the adhesive tape heads exposing the pole pieces is compared with the standard value of the ideal adhesive tape head exposing pole pieces, if the average value is larger than the standard value, the adhesive tape heads are exposed too much, and the adhesive tape sticking device is controlled to move the adhesive tape position downwards during the subsequent sticking; if the average value is smaller than the standard value, the head of the gummed paper is exposed too little, and the gumming device is controlled to move the position of the gummed paper upwards during subsequent gumming. There are, of course, more complex ways of rectifying the deviation, which are not described in detail here.
In some other embodiments, step 3 further comprises:
substep S31: and (4) subtracting the average value of the rubberizing distance data from the ideal standard value to obtain a first difference value. Taking the distance data d1 of the tab exposed at the head of the adhesive tape as an example, the average value of n d1 is m1, and the ideal standard value of the distance data d1 of the tab exposed at the head of the adhesive tape is 0.6mm, so that the first difference value is m 1-0.6.
Substep S32: and when the first difference is larger than the first preset value, multiplying the coefficient of variation by a coefficient larger than 1 to obtain a new coefficient of variation. For example, when the first difference m1-0.6 is greater than the value a, the coefficient of variation e1 of the gummed paper head is multiplied by a coefficient greater than 1, for example, 1.25. The value a is a first preset value, and the value a is a constant which can be set according to the precision requirement and experience.
And after obtaining the new variation coefficient, judging whether the new variation coefficient meets the preset requirement, and correcting the deviation of the rubberizing closed-loop deviation correcting system when the new variation coefficient meets the preset requirement. Namely, the new coefficient of variation is performed as the coefficient of variation in step S4 in step S4. The purpose of such artificial expansion of the coefficient of variation is to test how much margin is left from an acceptable coefficient of variation, heuristically, when the first difference is large.
Optionally, different coefficients may be selected to be multiplied by the variation coefficient according to the magnitude of the first difference. For example, when the first difference is greater than a and less than b (i.e., a < b), the coefficient of variation is multiplied by 1.25; when the first difference is greater than b, the coefficient of variation is multiplied by 1.65. Of course, different coefficients are chosen that are all greater than 1. This allows a better determination of how much margin remains from an acceptable coefficient of variation.
When the measured rubberizing distance data is the distance data of the pole piece exposed at the head part of the gummed paper and the distance data of the pole piece exposed at the tail part of the gummed paper, the average value of the distance data of the pole piece exposed at the head part of the gummed paper can be subtracted by the standard value of the pole piece exposed at the head part of the gummed paper and the average value of the distance data of the pole piece exposed at the tail part of the gummed paper can be subtracted by the standard value of the pole piece exposed at the tail part of the gummed paper respectively, the distance data of the pole piece exposed at the head part of the gummed paper and the distance data of the pole piece exposed at the tail part of the gummed paper can be subtracted to obtain a second difference value, whether the second difference value is larger than a second preset value or not can be judged, when the second difference value is larger than the second preset value, the coefficient of variation is multiplied by a coefficient larger, and when the new variation coefficient meets the preset requirement, correcting the deviation of the rubberizing closed-loop deviation correcting system. The second predetermined value is a constant that can be set empirically, similar to the first predetermined value. The reason why the difference between the data of the distance between the electrode plate exposed at the head of the adhesive tape and the data of the distance between the electrode plate exposed at the tail of the adhesive tape is used as the basis for judgment is that the two parameters have close correlation, and the width of the adhesive tape is generally considered to be constant, under the ideal condition, the data of the distance between the electrode plate exposed at the head of the adhesive tape and the data of the distance between the electrode plate exposed at the tail of the adhesive tape are equal, and if the difference obtained by subtracting the data of the distance between the electrode plate exposed at the head of the adhesive tape and the data of the distance between the electrode plate exposed at the tail of the adhesive tape from the data of the.
Optionally, in the deviation rectifying process, when the first difference is smaller than the deviation rectifying lower limit value, no deviation rectifying is performed; and when the first difference is larger than the deviation correction upper limit value, sending the deviation correction upper limit value to the controller. The lower deviation correction limit value can be understood as the minimum deviation correction precision of the equipment. For example, when the first difference is 0.05 and the minimum deviation rectification precision of the equipment is 0.1, it indicates that the difference is very small, even smaller than the deviation rectification precision of the equipment, and then the deviation rectification is not needed. The upper deviation correction limit value can be understood as the maximum deviation correction value of the equipment for performing one deviation correction action. For example, the second difference is 0.8, and the maximum deviation-correcting action of the equipment can correct 0.4, 0.4 is firstly sent to the controller, and the remaining 0.4 is sent to the controller for correcting again after the deviation correction is finished once.
The application also provides a deviation correcting system for detect and rectify a deviation to the material rubberizing effect, include: an image acquisition device 11 that acquires rubberizing distance data; the processor 12 calculates a variation coefficient according to the rubberizing distance data, and judges whether the variation coefficient meets a preset requirement; and the controller 13 controls the rubberizing closed-loop deviation rectifying system to rectify the deviation when the variation coefficient meets the preset requirement.
FIG. 3 is a system diagram of a deviation correcting system. The system comprises an image acquisition device 11, for example a CCD image acquisition device, typically comprising a camera, a light source, a lens, etc. The light source illuminates the pole piece, and the camera takes a picture to obtain an image containing a plurality of rubberizing distance data, such as the image shown in fig. 1. The cameras can be linear-array cameras and area-array cameras, and the linear-array cameras are preferably selected in the application so as to obtain longer distance data. The processor 12 is electrically connected to the image obtaining device 11, and calculates a variation coefficient according to the rubberizing distance data after acquiring the rubberizing distance data. The specific calculation method is as described above and will not be repeated here. The controller 13 is electrically connected with the processor 12 and the dang rubberizing closed-loop deviation rectifying system 14 respectively, and when the processor 12 sends a signal to the controller 13 to tell the controller 13 that the current variation coefficient meets the preset requirement, the controller 13 controls the rubberizing closed-loop deviation rectifying system 14 to rectify the deviation. The specific deviation rectifying method is the same as that described above, and is not described in detail here.
In this application, through calculating the coefficient of variation after obtaining rubberizing distance data, whether accord with according to the coefficient of variation and predetermine the requirement and judge equipment whether be in stable state, then decide again that rubberizing closed loop deviation correcting system rectifies and whether rectify, avoided rectifying when equipment is unstable and cause bigger degree in batches bad to the stability of equipment effect of rectifying is improved.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (10)
1. A deviation rectifying method is used for a rubberizing closed-loop deviation rectifying system and is characterized by comprising the following steps:
obtaining rubberizing distance data;
calculating a variation coefficient according to the rubberizing distance data;
judging whether the variation coefficient meets the preset requirement or not;
and when the variation coefficient meets the preset requirement, correcting the deviation of the rubberizing closed-loop deviation correcting system.
2. The deviation rectification method according to claim 1, characterized in that: the calculating a coefficient of variation from the rubberizing distance data comprises:
calculating an average value and a standard deviation according to the rubberizing distance data,
the coefficient of variation is the quotient of the standard deviation and the mean.
3. The deviation rectification method according to claim 2, wherein: the deviation rectifying method comprises the following steps:
the average value of the rubberizing distance data is differed from an ideal standard value to obtain a first difference value,
when the first difference is larger than a first preset value, multiplying the coefficient of variation by a coefficient larger than 1 to obtain a new coefficient of variation;
judging whether the new variation coefficient meets the preset requirement or not,
and when the new variation coefficient meets the preset requirement, correcting the deviation of the rubberizing closed-loop deviation correcting system.
4. The deviation rectification method according to claim 3, wherein: when the first difference is greater than the first preset value, multiplying the coefficient of variation by a coefficient greater than 1 to obtain a new coefficient of variation includes:
and selecting different coefficients to be multiplied by the variation coefficients according to the first difference, wherein the coefficients are all larger than 1.
5. The deviation rectification method according to claim 4, wherein:
the rubberizing distance data comprises one or more of distance data of the head of the gummed paper exposed out of the pole piece, distance data of the tail of the gummed paper exposed out of the pole piece, distance data of a gummed paper covering coating, distance data of the gummed paper and a coating edge, distance data of a gummed paper covering tab, distance data of a gummed paper covering sealant and distance data of the width of the gummed paper.
6. The deviation rectification method according to claim 5, wherein:
when the rubberizing distance data are the distance data of the pole piece exposed at the head part of the adhesive tape and the distance data of the pole piece exposed at the tail part of the adhesive tape, the distance data of the pole piece exposed at the head part of the adhesive tape and the distance data of the pole piece exposed at the tail part of the adhesive tape are differenced to obtain a second difference value,
when the second difference is larger than a second preset value, multiplying the coefficient of variation by a coefficient larger than 1 to obtain a new coefficient of variation;
judging whether the new variation coefficient meets the preset requirement or not,
and when the new variation coefficient meets the preset requirement, correcting the deviation of the rubberizing closed-loop deviation correcting system.
7. The deviation rectification method according to claim 1, characterized in that: the acquiring rubberizing distance data includes: a plurality of rubberizing distance data are acquired,
removing the extreme value, and performing preliminary filtering on the rubberizing distance data;
or setting a threshold range to carry out preliminary filtering on the rubberizing distance data.
8. The deviation rectification method according to claim 3, wherein: and when the first difference is smaller than the lower deviation correction limit value, not correcting the deviation.
9. The deviation rectification method according to claim 3, wherein: and when the first difference is larger than the deviation correction upper limit value, sending the deviation correction upper limit value to a controller.
10. The utility model provides a deviation correcting system for detect and rectify a deviation to material rubberizing effect, include:
an image acquisition device that acquires rubberizing distance data;
the processor calculates a variation coefficient according to the rubberizing distance data and judges whether the variation coefficient meets a preset requirement or not;
and the controller controls the rubberizing closed-loop deviation rectifying system to rectify the deviation when the variation coefficient meets the preset requirement.
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